Winding-drum.



Patented Jan. 12, 1909.

2 sums-sum 1.

QR 442 coca m C w/ Patented Jan, 12, 1909.

2 SHEETS-SHEET 2.

UNITED PATENT OFFICE.

FRANCIS DONALDSON, ()l" ll|"lSl.$URG, PENNSYLVANIA, ASSlGNOlt 'lU LIDGERWOOD MAN- UFACTURING COMPANY, Olr NEW YORK N. Y., A CORPORATION OF NEW YORK.

WINDING-DRUM.

Specification of Letters Patent.

Patented Jan. 12, 1900.

Application filed February 23, 1907, Serial No. 358,987. Renewed December 6, 1908. Serial No. 466,167.

ment in \Viinling-Drunis, and do hereby de- Clare that the following is a full, clear, and 1 exact; description thereof, reference being had to the accompanyingdrawings, in

which which the wear shall be so provided for that there is little danger of serious injury through lack of lubrication; and to such ends my invention consists in the winding drum hereinafter specified.

The winding drmns of hoisting engines. pile drivers, etc., have, prior to my invention, so far as I am aware. been so const ravied that the drum rotates upon its shaft. and 1 the journals of the shaft upon which tin drum mtates are necessarily more or less di 1' ficult of access, so that the lubrication of} such journals is occasionally overlooked, with the result that there is very scriouwear and heating between the drum and its shaft, and occasionally such serious injury occurs that the drum has to be rey'ilw-ed. The constant 'ull of the rope wound about the. winding (ruin, whether or not hoist inn is being done, causes a lateral pull of the drum on its shaft that makes the wear be tween the drum and shaft. very hoary unless the lubrication is good. When such wear occurs, it renders the machine useless for the i 1 constantly driven by the engine. The shaft remains stationary until it is desired to raise time being and will frequently prevent the working of a large force of men While thimachine is being repaired. By my invention the drum is fixed on its shaft, and all su h trouble is avoided.

In that. embodiment of my invent ion illusf -trated in the accompanying drawings. the

drum 10 is keyed to its shaft 11, the shaft l l l l l i l t l of the drum. On the inside of the rim of the gear are formed a series of slots 14 in which are received fins 15 on a clutch-member 16. flange 17 having the fins 15 formed thereon, and also having radial arms 18 preferably formed in one. piece with the tins and flange, the said arms having a plate 19 bolted to them. A ring 20 is supported by the flange and is provided with a series of sockets 21, in which are mounted the shanks 22 of bevelcd friction blocks 23. The annular series of friction blocks practically forms a cone which is adapted to be forced into the conical recess formed within a flange on the adjacent drumhead, a friction clutch thus being formed. In order to normally separate the clutchunembers, and also to hold the gear against the anti friction washers, sp higs 23" are interposed between the plate it) and the gear, such springs being prefrrably flat springs, as shown.

In order to force the members of the friction clutch together, the following means are provided: A collar ii-l is loosely mounted on the shaft against the plate 19, and for convenience of renewing the blocks of the friction clutch as later described, the said collar is made in two parts and united by bolts. .r slot is formed in the shaft, and a key 28, narrower than the said slot, is mounted in the latter, the key being held in place by a cotter at each end. A hole 27 is formed in the shaft and a roll 28 is inserted in the said hole. The collar 24 is refcrablr irovided. with a slot 29 in whicli the key is littr'd. A force oil-cup 30 may be secured upon the gear and connected with a pipe 31 running through the hub to supply 011 for the gear.

In the operation of my drum, the gear is or lower the load. \Vhen it, is desired to raise the load. the rod 28 is forced inward by any desired means. causin; the key, the

plit collar, the plate and the inner member of the friction clutch to more toward the drum, and thus causes the clutch to engage the drum and shaft to rotate with the gear. When it is desired to lower the load. or tostop the hoisting, the rod 38 is withdrawn, and the springs spread the Cllll't'll-IllQmbtT-i. causing the drum and shaft to cease to remay be placed between the gear and the hub vol ve.

The clutch-member comprises a.

It will be observed that as the drum is fixed upon the shaft in my construction, there can be no wear between such parts. Where, as in the ordinary construction, the

.5 drum revolves on the shaft there is always serious wear, whether or not hoisting is being done, because in such construction, the shaft is constantly rotating, and as the hoisting rope is always ulling on the drum, even though the drum e not revolving, there is a heavy side strain of the drum on the shaft, causing wear. If, as frequently happens, the jourpals of the drum on the shaft are not oiled, there may be serious injury within a short time, and the en ine has to be practieally dismantled to ma (e repairs.

\Vhile my gear is loose on the shaft, it will be observed that it has no longitudinal movement on the shaft, but it is only the clutch-member which is carried by the gear that has such movement. When the drum is not being revolved, the only wear which is taking place in my construction is that of the gear on its journal, and, as there is no strain on the gear at such time, such wear amounts to little. \Vhen there is no hoisting being done, the drum is stationary on the shaft, and the shaft is stationary in its main bearings.

The blocks of the friction clutch can readily be renewed in the construction which I have invented. It is only necessary to separate the parts of the split collar, and to remove the collar, and also, if necessary, the key (the latter being removable upon taking out one of its cutters) when the gear and its attached clutch-members can be moved away from the drum suiliciently to permit ready access to the blocks.

All of the bearings of my construction are easil oiled. They consist only of the main bearings of the shaft, and of the journals of the gear. The split collar forms a sort of cylinder-head to the cylinder formed by the hub of the plate 19, and the back and forth movement of the collar and plate serve to force oil in and out of the journal of the gear.

be the best embodiment of my invention, I desire it to be understood that the principles can be embodied in different forms, and I desire not to be limited beyond the requirements of the prior art, and the terms of my laims.

Having thus described my invention, 1 cl=|im i. In a hoisting apparatus, the combination of a shaft, a drum fixed on said shaft, a clutch-member mounted on said drum, a

car journaled on said shaft, a clutch-mem- Eer s lined within said ear, s rings interpose between said.clutc l-mem er and said gear, said springs tending to hold said gear 66 against said drum and to withdraw the While Ihave described what I consider to clutch-member from the drum, and means for forcing said gear clutch-member toward said drum.

2. In a hoisting apparatus, the combination of; a shaft, bearin therefor, a drum fixed on said shaft, a riction clutch member carried by said drum, a car journaled on said shaft, a friction clutc member car.- ricd by said gear, one of said members having a series of removable friction blocks, readily removable means interposed between one of said bearings and one of said friction clutch members for movin said clutch mem ber, the space between said clutch member and the. adjacent bearing bein at least as wide as said friction blocks, w ereby upon withdrawing said removable means, said friction clutch members may be sufliciently separated to remove said friction blocks.

3. In a hoistin apparatus, the combination of a shaft, Eearings therefor, a drum fixed on said shaft, a female friction clutch member carried by said drum, a ear journaled on said shaft. close to sai drum, a male friction clutch member carried by said gear, said last-mentioned member having a series of removable blocks, means interposed between said last-mentioned member and the adjacent bearing for moving said member said means for moving being removable, an the space between said last-mentioned member and said bearing bein equal at least to the width of said rembvab le blocks, whereby said gear and its clutch member may be withdrawn to permit the removal of said friction blocks.

4. In a hoistin apparatus, the combination of a shaft, earings therefor, a drum fixed on said shaft, :1 female friction clutch member carried by said drum, a ear journaled on said shaft close to sai drum, a male friction clutch member carried by said gear, said last-mentioned member having a series of removable blocks, means interposed between said last-mentioned member and the adjacent bearing for moving said member, said means for movingl being removable, and the space between sai. last-mentioned member and said bearing bein e ual at least to the width of said removab e b ocks, whereby said gear and its clutch member may be withdrawn to permit the removal of said friction blocks, said means for movin said male friction clutch member com rising a split collar mounted on the sha t, a ey mounted in a slot in the shaft and bearing against said split collar and a. rod longituuf We 2 tion blocks, and a spring inter osed between l said male clutch member an said gear to l hold said gear against said drum.

In testim ny that I claim the foregoing I have hereunto set my hand.

FRANCIS DONALDSON.

EDWIN J. PRINDLE,

l \Yitnesses l LILLIE CAss. 

